What is the symbol for Class C fires?

• A. It is a GREEN SQUARE
• B. It is a BLUE Circle
• C. It is a YELLOW DIAMOND
• D. It is a RED Triangle

Answer: (B)

Understanding extinguisher classification symbols helps you quickly pick the right tool for a fire. Class C fires are those involving energized electrical equipment, and the standard symbol used to denote this class is a blue circle. The blue circle signals electrical fires so responders know to use non-conductive extinguishing agents and to shut off power if safe to do so, rather than using water which can conduct electricity. The other shapes and colors shown correspond to other fire classes or labeling systems and do not indicate electrical fires, so they aren’t the correct symbol for Class C.